Tuesday in photos

A seagull sits on a statue of St. Peter, in St. Peter's Square at the Vatican, Tuesday, March 12, 2013. Cardinals heard a final appeal for unity Tuesday before sequestering themselves in the Sistine Chapel for the conclave to elect the next pope, as they celebrated Mass amid divisions and uncertainty over who will lead the 1.2 billion-strong Catholic Church and tend to its many problems. (AP Photo/Gregorio Borgia)Photo by Gregorio Borgia

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Amanda Knox and her family celebrate acquittalItaly's highest court overturned the murder conviction against Amanda Knox and her ex-boyfriend Friday over the 2007 slaying of Knox's roommate, bringing to a definitive end to the high-profile case.